Study on preparation and properties of nano-fiber membrane coated needle felt filter material
GUO Dian-ze1, GUO Ying-he2, HE Wei-dong1, LIU Jing-xian1
1. Filter Testing Center, College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Environmental and Chemical Engineering, Shenyang Polytechnic University, Shenyang 110159, China
Abstract：Water-soluble polyvinyl alcohol nanofibers were utilized as the adhesive layer, and a steam atomization method was employed as a substitute for high-temperature treatment to fabricate PET/PPS nanofiber membrane composite filters through a circular roller stretching and pressing technique. The performance of the composite filters was characterized. The results indicated that the adhesion strength of the PET/PPS nanofiber membrane composite filter reached a maximum of 4.521N when the pressure was set at 0.436N/cm2, the PVA spinning amount was 42.857mL/m2, and the processing temperature during the pressurization was maintained at 20℃. The filtration efficiency for fine particulate matter with a diameter of 0.3μm achieved 98.86%. In dynamic filtration performance tests, after 30 cycles of constant pressure blowing, the time required for a single cycle was recorded as 13.5minutes, with a residual resistance of 265.4Pa, which outperformed existing PTFE-coated filter materials.
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